RESEARCH REGARDING THE INFLUENCE OF MINERAL FERTILIZATION ALONG WITH Bradyrhizobium japonicum ON SOYBEAN GRAIN YIELD (Glycine max (L.) Merrill), UNDER THE CONDITIONS OF SOUTH - EAST ROMANIA

Published in Scientific Papers. Series A. Agronomy, Vol. LX
Written by Nicoleta CĂPĂȚÂNĂ, Ciprian BOLOHAN, Doru Ioan MARIN

The research was conducted over two agricultural years 2014/2015 and 2015/2016, and aimed to assess the influence of mineral fertilization and seed inoculation with nitrogen fixing bacteria Bradyrhizobium japonicum on soybean grain yield. The research was based on a split plot experiment placed on a chromic luvisoil, which was previously cultivated with maize. The results presented in this paper were obtained by analyzing the following factors: Factor A – soybean varieties from different maturity groups: Adsoy, Orion, Carla, Darina, PR92B63; Factor B – mineral fertilization levels N0P60K0 (Control), N0P60K0 + foliar fertilization; N45P60K0; N45P60K0 + foliar fertilization; N45P60K45; N90P60K45; Factor C – soybean seeds inoculated with Nitragin Bac Soya (Bradyrhizobium japonicum); soybean seeds non-inoculated with Nitragin Bac Soya (Bradyrhizobium japonicum). The average grain yield of the soybean varieties was 1898.5 kg/ha, varying from 1319.80 kg/ha (Orion) to 2483.43 kg/ha (PR92B63), for variants where the soybean seeds were inoculated with Bradyrhizobium japonicum. In variants were soybean seeds weren’t inoculated with nitrogen - fixing bacteria the average grain yield was 1829.80 kg/ha, varying from 1277.41 kg/ha (Orion) to 2483.43 kg/ha (PR92B63). Mineral fertilization generated a grain yield increase of 30.2%. Seed inoculation with nitrogen fixing bacteria brought an increase of the grain the yield of 3.76%.

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CĂPĂȚÂNĂ N., BOLOHAN C., MARIN D.I. 2017, RESEARCH REGARDING THE INFLUENCE OF MINERAL FERTILIZATION ALONG WITH Bradyrhizobium japonicum ON SOYBEAN GRAIN YIELD (Glycine max (L.) Merrill), UNDER THE CONDITIONS OF SOUTH - EAST ROMANIA. Scientific Papers. Series A. Agronomy, Vol. LX, ISSN 2285-5785, 207-214.


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